Furnace.



F. MBRIAN.

FURNACE. urmonmn FILED SEPT. 12, 1911.

1,058,191. Patented Apr. 8, 1913.

2 BEEEETS-BHEET 2.

WITNES SESI I I MINVENTOR Atly's UNITED srrATEs PATENT 0FFIOE.

' k v I Y N V FREDERIC MERIAN, 0F EITTSBURGHZ, PENNSYLVANIA, ASSIGNOZR, T0 FORTER MILLER ENGINEERING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLYANI! summon.

To all whom it may concern:

Be it known that I, FREDERIC MERIAN, a citizen of the Republic of Switzerland, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improve ments in Furnaces, of which the following is a specification.-

My invention consists of an improvement in furnaces for billets, blooms, etc., and is .of the continuous type. In such furnaces the articles to be heated are charged into the furnace at one end and thence throughout the longitudinal interior thereof, being submitted to the act-ion of the heating gases, and finally discharged at the other end of the furnace.

- The objects of the present invention are to provide, in such a structure, means for complete enveloping circulation of the gases of combustion, avoidance of any interiotc fluid circulation connections, and for discharging the accumulated scale, cinder, and other material which constantly accumulates in the bed of the furnace.

In the drawings: Figure 1 is a central longitudinal sectional view of the furnace. Fig-.2 is a transverse sectional view indicated by the line II. II. of Fig. 1. Fig. 3 is a horizontal sectional view indicated by the line III. III. of Fig. 1. Fig. 4 is an a portion of enlarged detail plan View of the ingot supporting construction, showing a'modified arrangement.

The-furnace, as a whole, is of the usual or an desired construction having the main foun ation base 2, side walls 3, 3, end Walls 4 and 5, and roof 6, said parts bein constructed of brickwork and brace and stayed in the usual manner customary with furnaces of this type. charging opening or door 7 is providedbat one end of the furnace and Ya discharging opening 8 atthe other end, preferably somewhat lower, whereby the ingots, etc., may be advanced pushing mechanism along through the furnace. Fuel for combustion, preferably in gaseous form, is supplied at the rear end of the furnace through ports 9 and 9, the fuel in combustion traversing the length of the furnace throughout its interior l0 and passing downwardly through suitable ports to. an outlet or stack connec- Specification 6f Letters Patent. Application filed September 12, 1911.

water therethrough,

the circulation of so as to surround practically all of the sur- Patented Apr. 8, 1913. Serial N 0'. 648,930. 4

tion 11. Openings 12, preferably provided with closing doors or covers 13, are provided at intervals along one or both of the side walls 3, for inspection of the interior, etc. The ingots rest upon longitudinal supports lat, of any suitable type but preferably of the well-known tubular skid pipe form, whereby to provide for circulation of said pipes being connected at each end with suitable supply and waste pipes, as will be readily understood. These supports or pipes are held in posi tion .upwardly above the main floor level 15 of base 2 by series of individual piers or abutment-s16, of brickwork or other refractory material. These ipiers are of comparatively short length but arranged in continuous series longitudinally and in alinement throughout the furnace, a series of such piers being provided for each of the individual supports or pipes 14. The 16 of one such series alternate in posltion with those 'of the next adjacent series, suchj arrangement being maintained throughout the entire width of the furnace. Likewise the ends of the piers 16 are preferably. beveled or rounded off at the corners, as indicated in Figs. 3 and .4, and the top faces are beveled downwardly from the skid pipes, as shown in Fig. 2. By such arrangement the gases of combustion faces of the ingots is facilitated, the gases circulating underneath the supports 14 through the spaces 17 between the ends of the adjacent piers of each longitudinal series and also transversely in a tortuous path as indicated by the arrows in Fig. 3, as well as throughout the entire upper portion of the furnace chamber for its full length to the outlet opening 11. By this arrangement. the even and continuous heating of the ingots in a furnace of this type is greatly facilitated and the fuel utilized to the best advantage.

A further feature ofivalue and advantage is that the floor of the furnace bed is continuous, with the exception of the intermittently and alternatingly arranged piersl6,

piers and facilitates the easy and. rapid removal The circulation maintained open clogged or filled of accumulated scale, etc. space'ofthe gases is easily and is not subject to being weight ofthe billets,

" 25 scale and slag.v

up as'is frequently the case with furnaces of thei' same general type where the ingot-supporting bars, rails, "or pipes are mounte upon continuous upwardly extending ridges 5 orpiers.

p A further feature of advantage is that, in the case of a furnace designed for heating j short billets, etc., requiring two closely ad- 'jacentlongitudinal supporting rails, the 10. 'iers cannot be made continuous without eing lbcated so closely together as to-praotically-close the circulation space for thef gases. It becomes also necessary to either' make the'piers very thin or to lay the two rails or pipes on one sulficiently wide pier.

' Such construction is undesirable as the piers, if thin, will break or crush under the 3 I and if made .of sufli-" 'cient width, the intervening narrow space; will soon fill up with refuse, preventing cir- 1 culation of the gases. If two rails are laid on a single wide pier, there is no circulation 'space, or if a circulating channel is originally provided, it will soon fill up 'wltht These objections are entirely Z overcome. It will'also be seen that, when a furnace is constructed in accorda ce with my invention, ample ga s' circulation space; may be provided with an increased number? of billetsupporting rails or pipes in a fur-E name of any. given width. Thus in Fig. 4 I; have shown an arrangementwhich permits the placing of the-pipes 14 somewhat closer together, the alternating arrangement of the short piers 16 permitting theouteredges of said piers to be located even beyond the longitudinal line of the confronting face of the j next adjacent, series of piers; [By'this arrangement the same facility and space for 44;, the circulation of the gases is provided,with- I out impairment of the utilization of their heating elfioiency.

. By staggering the piers, as shown, the

circulation area for the gases, transverselyl 45 of the furnace, is maintained at a maximum, 1

or details of the same ma tudinally arran thereby, improving the draft cpnditions and producing a slower flow.

The. supporting piers are made of the.

same material as the furnace, i. cabrick or other refractory material, capable of being built of the desired size, shape and proportions, and providing. a satisfactory and durable supportfor the pipes.

It will be understood that the arrangement, number, size, design, etc., of the piers; the construction of the furnace as a whole or as to its several parts; or other features be variously changed or modified by the s lled mechanic or furnace builder, but all such changes, in so far as they relate to theimat-ter claimed, are to be considered within the scope of the following claim.

. What I claim is:

In a continuous heating furnace havin a longitudinalheating'chamber and provi ed with a charging opening at one end and a discharging opening at the other end and means for establishing a circulation of gases ofcombustion through the heating chamber; the combination with a plurality of longid skid pipes located upwardly above the bed of the furnace, of a series of supporting piers for each pipe of refractory material extending upwardly from the bed of the furnace, the piers of adj'acent series being in staggered relation and having their corners an upper sidefaces beveled to facilitate circulation of the gases of combustion, v piers extending inwardly beyond the side V the side faces of some of said faces of the next adjacent series, substantially as set forth,

In testimony whereof I hereunto aflix my.

signature in the presence of two witnesses.

FREDERIG MERIAN.

Witnesses:

PETER Gmcx, C. M. CLARKE. 

